Preparation and characterization of ultrafine zinc sulfide particles of quantum confinement

✍ Scribed by Ming Wu; Wanzhen Gu; Wenzhao Li; Xiangwei Zhu; Fudong Wang; Shiting Zhao

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 549 KB
• Volume: 224
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(94)00580-x

✦ Synopsis

We describe the preparation and characterization of highly monodispersed, stabilized and size-fLxed ZnS Q-particles. In these samples, small ZnS particles were well accommodated by ~-cyclodextrin cavities. The included ZnS particle size was determined to be 9.7-12.2 .~ by scanning tunnel microscope, which is consistent with the inner diameter of the cyclodextrin cavity. The microcrystalline structure was identified to be of sphalerite-type by X-ray diffraction. A very sharp and blue-shift exciton peak of optical absorption was observed at the 245-250 nm band and was well accounted for by a recent theoretical model based on a tight-binding approximation.